High corrosion resistance prefabricated overhead insulation pipe and preparation method thereof

A heat preservation pipe and corrosion-resistant technology, which is applied in the direction of heat preservation, pipe protection through heat insulation, pipe anti-corrosion/rust protection, etc., can solve the problems of accelerated corrosion of working steel pipes, and achieve improved corrosion resistance, compact texture, and high mechanical strength Effect

Active Publication Date: 2021-11-26
青岛远通达中通能源集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since the double-layer epoxy powder is sprayed between the working steel pipe and the polyurethane foam insulation layer, when the insulation pipe is impacted and damaged by external force, the epoxy powder coating, polyurethane foam insulation layer and outer sheath will be broken. Air and water will invade the working steel pipe along the cracks and contact with the working steel pipe, which will accelerate the corrosion of the working steel pipe

Method used

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  • High corrosion resistance prefabricated overhead insulation pipe and preparation method thereof
  • High corrosion resistance prefabricated overhead insulation pipe and preparation method thereof
  • High corrosion resistance prefabricated overhead insulation pipe and preparation method thereof

Examples

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preparation example Construction

[0066] Preparation example of seaweed extract

[0067] The beater in each preparation example of seaweed extract is the beater provided by Jingjiang Zhongde Machinery Manufacturing Factory, the model is DJ2-001; the ball mill is the ball mill provided by Chuangfulai, the model is air-cooled XQM-4L, and the output particle size is 0.00001 mm (10nm); seaweed is commercial seaweed.

[0068] (1) Take a certain amount of seaweed to soak and clean until the surface is free of mucus;

[0069] (2) adding deionized water to the seaweed treated in (1), so that the volume ratio of feed water reaches 1:5, and then beating in a beater to make a slurry;

[0070] (3) After the slurry obtained in (2) is left to stand for 30min, carry out solid-liquid separation through filtration, and get the upper layer liquid;

[0071] (4) Take the upper layer liquid in (3) and dry it for 2 hours at a temperature of 65° C. to obtain a dry powder;

[0072] (5) Put the dry powder in (4) through wet ball mi...

preparation example 1

[0076] S1. Weigh 0.2kg of zinc sulfate, 100kg of 1mol / L hydrochloric acid solution, 4kg of tetraethyl orthosilicate, 2kg of polyethylene oxide polypropylene oxide monobutyl ether, and 6 kg of corrosion inhibitor;

[0077] S2. Add the zinc sulfate weighed in S1 into a 1mol / L hydrochloric acid solution, and stir for 20 minutes at a constant temperature of 40°C and a stirring rate of 1000r / min to obtain a solution A;

[0078] S3. Add polyethylene oxide polypropylene oxide monobutyl ether to the solution A obtained in S2, and stir for 50 min at a constant temperature of 40° C. and a stirring rate of 1000 r / min to obtain a solution B;

[0079] S4. Add tetraethyl orthosilicate to the solution B obtained in S3, and stir for 200 minutes at a constant temperature of 40° C. and a stirring rate of 1000 r / min to obtain a solution C;

[0080] S5, the solution C obtained in S4 was left to stand at room temperature for 24 hours, and then filtered at room temperature, and the precipitate in t...

preparation example 2

[0087] S1. Weigh 0.4kg of zinc sulfate, 150kg of 1mol / L hydrochloric acid solution, 6kg of tetraethyl orthosilicate, 3kg of polyethylene oxide polypropylene oxide monobutyl ether, and 7kg of corrosion inhibitor;

[0088] S2. Add the zinc sulfate weighed in S1 into a 1mol / L hydrochloric acid solution, and stir for 25 minutes at a constant temperature of 40°C and a stirring rate of 1000r / min to obtain a solution A;

[0089] S3. Add polyethylene oxide polypropylene oxide monobutyl ether to the solution A obtained in S2, and stir for 60 min at a constant temperature of 40° C. and a stirring rate of 1000 r / min to obtain a solution B;

[0090] S4. Add tetraethyl orthosilicate to the solution B obtained in S3, and stir for 220 minutes at a constant temperature of 40° C. and a stirring rate of 1000 r / min to obtain a solution C;

[0091] S5. The solution C obtained in S4 was left to stand at room temperature for 24 hours, and then filtered at room temperature;

[0092] S6. Take the fi...

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Abstract

The invention discloses a high-corrosion-resistant prefabricated overhead thermal insulation pipe and a preparation method thereof, and relates to the technical field of thermal insulation pipes. The key point of the technical solution is a high-corrosion-resistant prefabricated overhead thermal insulation pipe, which includes a steel pipe base body and a steel pipe base outer peripheral surface coating There is a polyurethane thermal insulation layer, the outer peripheral surface of the polyurethane thermal insulation layer is covered with an outer protective layer, and the outer peripheral surface of the outer protective layer is coated with a protective layer; the protective layer is formed by curing the protective liquid: the protective liquid is made of the following raw materials: protective Agent A, protective agent B, nano self-healing agent; the protective agent A is made of the following raw materials: cerium nitrate, hydrogen peroxide, sodium fluorosilicate, water-based acrylic resin, 1wt% ammonia solution, graphene, molybdic acid Sodium; the protective agent B is made of the following raw materials: vinyltriethoxysilane, propyltrimethoxysilane, acidic solvent, which has the advantages of high mechanical strength, good corrosion resistance and fire resistance.

Description

technical field [0001] The invention relates to the technical field of thermal insulation pipes, more specifically, it relates to a prefabricated overhead thermal insulation pipe with high corrosion resistance and a preparation method thereof. Background technique [0002] Insulation pipe is the abbreviation of heat insulation pipe, which is often used for the transportation of liquid, gas and other substances. There are two types of insulation pipes and polyurethane insulation pipes. Among them, the polyurethane insulation pipe is composed of a working steel pipe layer, a polyurethane insulation layer and a high-density polyethylene protective layer from the inside to the outside. However, due to the shortcomings of high-density polyethylene, such as poor mechanical properties, easy deformation, easy aging, easy brittleness, easy stress cracking, low surface hardness, and easy scratches, it is gradually replaced by a galvanized iron protective layer. [0003] The existing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L59/02F16L59/05F16L59/10F16L58/04F16L57/02F16L57/04C09D183/07C09D133/04C09D7/61C09D5/18C09D5/08C09D7/63C09D7/65B29D23/00
CPCB29D23/001C08K2003/3045C08K2201/011C08L2201/02C09D5/08C09D5/18C09D183/04C09D7/61C09D7/63C09D7/65C09D7/70F16L57/02F16L57/04F16L58/04F16L59/028F16L59/04F16L59/10C08L33/04C08L5/00C08L89/00C08K13/06C08K3/28C08K3/042C08K3/24C08K3/36C08K7/26C08K9/12C08K5/175C08K3/30
Inventor 王明军王远斌张其波
Owner 青岛远通达中通能源集团有限公司
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